材料科学
有机发光二极管
系统间交叉
光电子学
荧光
电致发光
量子效率
辐射传输
航程(航空)
接受者
纳米技术
原子物理学
光学
物理
复合材料
凝聚态物理
单重态
激发态
图层(电子)
作者
Meng Yuan,Guohao Chen,Hao Peng,Jingsheng Miao,He Liu,Chuluo Yang
标识
DOI:10.1002/adom.202401479
摘要
Abstract Exploring possible strategy to balance the radiative decay and reverse intersystem crossing (RISC) are of great significance in thermally activated delayed fluorescent (TADF) emitters for enabling both high efficiency and low efficiency roll‐off. Herein, by introducing a multi‐resonance (MR) type acceptor, two TADF emitters featuring hybridized short‐range charge transfer (SRCT) and long‐rang charge transfer (LRCT) are designed. LRCT‐dominate photoluminescent nature is maintained with a short delayed lifetime of 1.5–3.4 µs. While the incorporated SRCT accelerates the radiative decay. Consequently, both emitters demonstrate remarkable electroluminescent performance with maximum EQE (EQE max ) of 40.8% for IT‐BO and 39.0% for IA‐BO, respectively, along with ultra‐high luminance of up to 120 000 cd m −2 . More encouragingly, both emitters can enable small efficiency roll‐off with a minimum value of only 4%, highlighting the significance of enhanced k r in suppressing the roll‐off. Moreover, when served as sensitizers, both compounds can also endow excellent performances with EQE max ≈38%. This work presents an innovative approach by hybridizing SRCT and LRCT for developing practical TADF emitters.
科研通智能强力驱动
Strongly Powered by AbleSci AI